Circular Optical Window

Product Type: Protected Gold Mirror Shape: Round Substrate Material: BK7 / Fused Silica

The Protected Gold Mirror is a precision metal-coated optical component featuring a circular gold-coated reflective surface. Protected by a dielectric overcoat, the gold film delivers high average reflectance across the near-infrared to far-infrared spectrum (approximately 800nm-20µm). Built on high-quality BK7 or fused silica substrates with excellent surface flatness, these mirrors are ideal for infrared laser beam delivery, FTIR spectroscopy, thermal imaging, and general IR optical system applications requiring broadband, high-efficiency reflection.

Product Shape: Circular disc / round wafer Device Type: Piezoelectric quartz resonator (QCM sensor crystal) Substrate Material: Quartz (white/translucent)

The image shows a quartz crystal microbalance (QCM) sensor crystal, presented in two views: the electrode side and the blank side. It is a round, white/translucent piezoelectric quartz disc. One face carries a precisely patterned silver-gray metal electrode consisting of a central circular pad, a split concentric outer ring, and opposing top/bottom contact tabs; the opposite face is blank and unpatterned. This type of crystal is mounted in a sensor head inside a vacuum coating chamber. When coating material deposits on the crystal surface, the added mass reduces its resonant frequency, and the monitor converts the frequency shift into film thickness and deposition rate. The image contains no printed text, so detailed parameters such as resonant frequency, diameter, quartz cut and electrode metal should be confirmed with the supplier.

Crystal Material: AT-cut quartz Fundamental Frequency: 6MHz Diameter: 14mm (0.55in)

The product is a circular quartz crystal microbalance (QCM) sensor crystal used as the sensing element in thin film deposition monitoring systems. One face of the disk carries a patterned metal electrode with an outer ring segment, central circular electrode and top/bottom contact tabs, while the opposite face is blank and unpatterned. Made from an AT-cut quartz blank, the crystal oscillates at its resonant frequency inside a vacuum coating chamber; as coating material accumulates on the electrode, the added mass lowers the frequency in proportion to the deposited mass (Sauerbrey relationship), allowing a connected deposition monitor or controller to calculate deposition rate and film thickness in real time. It is a standard, low-cost consumable for optical coating, semiconductor, OLED and general PVD processes.

Product Type: Quartz Crystal Microbalance (QCM) Sensor Crystal Nominal Frequency: 5MHz / 6MHz Crystal Cut: AT-cut

The product shown is a Quartz Crystal Microbalance (QCM) sensor crystal: a circular AT-cut quartz wafer with a precisely patterned metal electrode (typically gold) on the front side, featuring a wrap-around ring pattern with anchor contact pads, and a blank unpatterned back side. Mounted in a standard crystal sensor head, it oscillates at its resonance frequency; when material is deposited on its surface during vacuum coating, the added mass causes a proportional frequency shift, which is converted into deposition rate and film thickness by a QCM monitor or controller. It can also be used as a highly sensitive mass sensor for chemical and biological detection applications.